Toby, Dave & Ian Explain XKCD 
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January 13
February 13
March 14
April 13
May 13
June 13
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August 13
September 13
October 13
November 5
December
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January
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March 1
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May 2
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July 1
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September 9
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November 13
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January
February 1
March
April 1
May 1
June
July 4
August 1
September 1
October
November 1
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January
February
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April
May
June 2
July
August 1
September 1
October
November
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2006 2007 →
January 2
February 1
March 1
April
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June 2
July
August 3
September 1
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December